177results about How to "Guaranteed toughness" patented technology

The invention discloses fine-grain high-cleanliness steel for a harmonic reducer flexible gear of an industrial robot and a preparation method, and belongs to the technical field of metallurgy. The steel for the flexible gear comprises the following chemical components in percentage by mass: 0.38 to 0.42 percent of C, 0.20 to 0.30 percent of Si, 0.60 to 0.90 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, 0.60 to 0.90 percent of Cr, 0.15 to 0.25 percent of Mo, 1.50 to 1.80 percent of Ni, 0.015 to 0.035 percent of Nb, less than or equal to 0.0006 percent of O and the balance of iron and inevitable impurity elements. The production method comprises the working procedures of vacuum induction furnace smelting, electroslag remelting, casting blank forging, bar heating, bar rolling and rolled material cooling. The steel for the flexible gear has fine austenite grains and high cleanliness, and the technical requirements of the steel for the harmonic reducer flexible gear of the industrial robot are met.

The invention discloses a preparation method of a flame-retardant anti-aging polyolefin plastic, and belongs to the technical field of polyolefin material processing.The preparation method comprises the steps that a modified anti-aging agent is mixed with a DOPO-based flame retardant modified by introducing isocyanate and epoxy groups, the mixture is added into a polyolefin material, during combustion, carbon formation is promoted by the phosphorus element, and the flame-retardant anti-aging polyolefin plastic is obtained. The flame retardant and nitrogen element synergistically play a flame-retardant role, meanwhile, epoxy groups in the flame retardant and carboxyl of polypropylene are subjected to a ring-opening reaction, the crosslinking degree of the material is enhanced, the modified anti-aging agent can effectively capture free radicals and inhibit oxidative degradation, and the mechanical strength and flame-retardant effect of the material are improved. According to the modification method, the anti-aging, high-temperature-resistant and flame-retardant properties of the polyolefin plastic are remarkably improved, the stability of the polyolefin plastic in high-temperature and severe environments is enhanced, the service life is prolonged, and the mechanical property and the thermal stability of the polyolefin plastic are improved.

The invention relates to a small-specification low-chromium high-carbon steel wire rod and a preparation method thereof. The diameter of the wire rod is # imgabs0. Chemical components of the wire rod comprise 0.79%-0.84% of C, 0.20%-0.30% of Si, 0.70%-0.90% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.020% of S, 0.18%-0.23% of Cr, smaller than or equal to 0.0040% of O, smaller than or equal to 0.0050% of N and the balance Fe and impurities. The production technology process mainly including KR molten iron pretreatment, converter smelting, LF refining furnace smelting, continuous casting, controlled rolling and controlled cooling and heat preservation channel slow cooling is adopted, the sorbite rate of the product reaches 90% or above through the measures of Cr micro-combination, the stelmor cooling technology and the like, the requirements of the high strength and the drawing technology of the wire rod are met, and the product quality is improved. The problems that in the wire rod production process, due to the fact that abnormal structure martensite appears, the strength is high, and brittle failure is caused in the wire rod drawing process are solved.

The invention provides a hot-rolled seamless steel pipe and a wall thickness controllable processing technology thereof, and aims to solve the problem that the wall thickness of a steel pipe is difficult to accurately control in the prior art. Real-time monitoring and control over the wall thickness of the steel pipe are achieved, so that the wall thickness precision is remarkably improved, raw material components of the seamless steel pipe comprise C, Si, Mn, P, S, Cr, Mo, Ni and Fe, the wall thickness range of the seamless steel pipe is 5-20 mm, and the preparation technology comprises the steps of raw material proportioning, vacuum smelting, mold cylinder preheating and coating treatment, wall thickness laser measurement, rotating speed regulation and control forming, annealing, forced cooling treatment and the like. Through 300-600 times of high-frequency wall thickness measurement per second, the wall thickness uniformity and precision of the steel pipe in the whole production process are ensured in combination with rotating speed regulation and forced cooling, and finally the product quality and economic benefits are improved.

This invention belongs to the field of sensors, and relates to a polymer ionogel membrane for capacitive sensors, its preparation method, and the capacitive sensor itself. One side of the membrane has a layer of spontaneously crystallized polymer ionogel particles. The gel particles have a spherical or near-spherical structure, and the gel particle layer forms an uneven structure on one side surface of the membrane. Each gel particle includes a porous polymer backbone and an ionic liquid located within the pores. The polymer backbone includes an enriched first PVDF-based polymer. Adjacent polymer ionogel particles are mainly connected by a second PVDF-based polymer. The composition of the polymer ionogel membrane includes a PVDF-based polymer to ionic liquid mass ratio of 1:2 to 2:1. Based on the mass of the PVDF-based polymer, the content of the first PVDF-based polymer is 80wt% to 95wt%, and the content of the second PVDF-based polymer is 5wt% to 20wt%. When used in a capacitive sensor, the gel membrane can improve detection sensitivity.

The invention provides a high-strength carbon ceramic brake disc. The high-strength carbon ceramic brake disc comprises 40-60 vol% of carbon, 30-55 vol% of silicon carbide and 3-13 vol% of silicon. The carbon comprises a resin carbon fiber phase and a deposited carbon fiber phase, and the resin carbon fiber phase comprises resin carbon and skeleton carbon fiber coated by the resin carbon; the deposited carbon fiber phase comprises deposited carbon and filled carbon fibers coated with the deposited carbon; the content of the resin carbon fiber phase is 35-55%, and the content of the deposited carbon fiber phase is 3-15%. According to the high-strength carbon ceramic brake disc, the resin carbon fiber phase is used as a main material, the resin is used for impregnating fibers, curing is performed, then chopping is performed, and during chopping and impregnating of the resin carbon fiber phase, due to protection of the resin, fiber damage is small, and the strength of the brake disc is effectively improved; part of filling fibers which are subjected to chemical vapor deposition but have a smaller k value of fiber bundles are also added into a matrix, and a deposited carbon fiber phase can play a role in deflecting cracks in a product due to the existence of an interface of deposited carbon / carbon fibers, so that the toughness of the material is ensured.

The invention belongs to the technical field of medical instruments, particularly relates to a urinary surgery calculus flushing device and a use method thereof, and aims to overcome the defects that in the prior art, calculus cannot be collected, and the water pressure of cleaning fluid cannot be adjusted when the calculus is flushed. A handle is fixedly mounted at the bottom of the mounting box, an outer hose is fixedly mounted on the inner wall of one side of the mounting box, one end of the outer hose extends to the outer side of the mounting box, an inner pipe is fixedly mounted in the outer hose, a downpipe is fixedly mounted on the inner wall of the bottom of the mounting box, and the bottom end of the downpipe extends to the position below the mounting box and is fixedly provided with a threaded sealing cover. When calculi in the urethra of a patient are flushed, stamping of cleaning liquid can be adjusted, so that discomfort is not increased when the patient is flushed, meanwhile, the crushed calculi can be sucked out in time, and the crushed calculi can be prevented from remaining in the urethra of the patient.

The invention provides an Al-Mg-Zn-Mn alloy profile and a preparation method thereof, and relates to the technical field of aluminum alloy processing.The preparation method comprises the following steps that an Al-Mg-Zn-Mn alloy cast ingot is prepared, and the cast ingot contains a primary Al6Mn phase and a primary T-Mg32 (AlZn) 49 phase; performing soaking treatment on the cast ingot; cogging treatment is conducted on the cast ingot obtained after soaking treatment, then extrusion forming is conducted, so that a T-Mg32 (AlZn) 49 phase is redissolved into an aluminum matrix, online quenching is conducted, and an extruded profile is obtained; stretching and straightening the extruded profile; and aging treatment is conducted, specifically, aging treatment is conducted on the stretched and straightened profile, so that the T-Mg32 (AlZn) 49 phase is separated out, and the Al-Mg-Zn-Mn alloy profile is obtained. The content of Mn in the raw materials is increased, the mass percentage content ratio of Zn to Mg is controlled, the proportion of recrystallized grains is increased through high-temperature extrusion forming, and the supersaturation degree of a matrix is improved through online quenching; and after aging treatment, dispersed precipitation of a T phase is promoted, and the obdurability of the aluminum alloy profile is remarkably improved. According to the method, off-line solid solution quenching is not needed, and the Al-Mg-Zn-Mn alloy profile with the large size and the high toughness can be prepared.

The invention discloses a TC18 titanium alloy organization service performance consistency heat treatment process method, belongs to the field of metal material heat treatment technology, which includes the following steps: the first step of heat treatment: single-phase zone heating, using TC18 titanium alloy, TC18 titanium alloy is kept at Tβ-40℃ for 1h according to the air burning heat treatment process, heated to [Tβ+15℃, Tβ+35℃] for 0-4h, and cooled to room temperature; the second step of heat treatment: double annealing, the cooled TC18 titanium alloy is heated to 820-850℃ for 1-3h and then furnace cooled, after furnace cooling, kept at 740-760℃ for 1-3h and then air cooled, after air cooling, kept at 600-620℃ for 2-6h and then air cooled to room temperature. The present invention selects different insulation temperatures and times, regulates the equiaxed α grain size of TC18 titanium alloy, and determines the heat treatment process parameters, so that the TC18 titanium alloy has both high tensile strength and good strength and fracture toughness.

The invention provides a high-strength and high-thermal-stability Al-Cu-Mg-Si alloy and a preparation method thereof, and belongs to the technical field of aluminum alloys. The Al-Cu-Mg-Si alloy comprises the following chemical components in percentage by mass: 0.5-0.9% of Si, less than or equal to 0.5% of Fe, 3.9-5.0% of Cu, 0.4-1.2% of Mn, 0.2-0.8% of Mg, 0.15-0.2% of Zr, 0.1-0.2% of Cr, less than or equal to 0.1% of Ni, less than or equal to 0.25% of Zn, less than or equal to 0.15% of Ti, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of total impurity and the balance of Al. The yield strength of the Al-Cu-Mg-Si alloy is larger than or equal to 475 MPa, the tensile strength is larger than or equal to 540 MPa, the percentage elongation after fracture is larger than or equal to 12%, after the Al-Cu-Mg-Si alloy is exposed for 100 h at the temperature of 200 DEG C, the tensile strength is larger than or equal to 210 MPa, the yield strength is larger than or equal to 188 MPa, the exfoliation corrosion level is EB, and the corrosion resistance and toughness of the Al-Cu-Mg-Si alloy are still kept at the high level while the strength and the heat stability of the aluminum alloy are improved.

The invention discloses a laser splicing welding joint for ultrahigh-strength hot-formed steel and a manufacturing method of the laser splicing welding joint, the welding joint comprises a base metal area and a melting area, and the base metal area and a welding line area are mainly composed of tempered martensite; the mass percent of the carbon content in the base metal area is not lower than 0.2%, and the mass percent of the average aluminum content in the weld joint area is not higher than 1.8%. The welding joint is manufactured through the following steps that a pair of high-strength steel workpieces is provided to be in butt joint to execute laser welding, and in the welding process, laser filler wire welding is adopted to obtain a preliminary welding seam; performing a quenching process on the primary welding seam to obtain a final welding seam; the quenching process comprises a heating and heat preservation stage and a cooling stage; the time for quickly transferring and cooling the welding part is t1, and the temperature of the welding part is T1; the cooling stage comprises a stage from T1 to the temperature T2 and a stage from T2 to the room temperature through slow cooling, the duration time of the rapid cooling stage is t2, and the duration time of the stage from slow cooling to the room temperature is t3.

The invention discloses a primary and secondary synergistic flexible stop valve with a self-recovery valve rod, relates to the technical field of valves, and aims to solve the problems of how to find a breakage fault of the valve rod in time and how to recover the function of the valve rod automatically. The stop valve comprises a main valve and a secondary valve, wherein the main valve mainly comprises a main valve body, a main valve cover, a main valve rod, a main valve core, a valve rod fracture self-sensing mechanism and a redundant valve rod mechanism; through the arranged valve rod breakage self-sensing mechanism, automatic identification can be achieved when the main valve rod is broken and the main valve element falls to the valve seat; through the arranged redundant valve rod mechanism, after the valve rod fracture self-sensing mechanism recognizes that the main valve rod is fractured, the redundant valve rod can be controlled to replace the main valve rod to be connected with the main valve element, self-recovery of the function of the valve rod is achieved, and the toughness of the structural layer of the stop valve is guaranteed; the secondary valve can replace the main valve to carry out overflowing control after the main valve rod is broken and before self-repairing, so that the stop valve keeps the original function without losing, and the toughness of the functional level of the stop valve is ensured.

The invention discloses a low-temperature cured bi-component epoxy resin conductive adhesive. A component A and a component B are mixed according to a ratio of 1: 1 and then cured at room temperature; the component A at least comprises the following components: novolac epoxy resin, epoxy resin, core-shell toughened epoxy resin, a diluent, a coupling agent, a thixotropic agent and a conductive filler; the component B at least comprises the following components in parts by mass: a curing agent and an accelerant; wherein the core-shell toughened epoxy resin is bisphenol A epoxy resin with uniform nanoscale core-shell particle dispersity; the invention also discloses a preparation method of the low-temperature cured bi-component epoxy resin conductive adhesive. The curing of the conductive adhesive at low temperature or room temperature is realized, the internal reaction degree of the matrix is high, the mechanical strength and conductivity of the conductive adhesive are met at the same time, and effective bonding is realized and relatively good performance is kept after electronic components are cured in application scenes with use temperature requirements.

The invention discloses low-cost RE and B microalloyed steel rail steel and a preparation method thereof. The low-cost RE and B micro-alloyed rail steel provided by the invention comprises the following chemical components in percentage by mass: 0.68-0.76% of C, 0.18-0.26% of B, 0.18-0.18% of C, 0.18- 0.35% to 0.60% of Si; 0.90 to 1.10% of Mn; p is less than or equal to 0.02%; s is less than or equal to 0.02%; 0.05 to 0.1 percent of V; b: 0.001 to 0.005% of the total weight of the raw materials; 0.002 to 0.01 percent of RE (rare earth); and the balance is Fe and impurities. The low-temperature impact performance can be improved by adding RE, and the B microalloy is added to replace Mo and Ni alloy contents, so that the hardenability of the steel is improved. The steel rail steel has good obdurability, the alloy manufacturing cost is reduced, and the market competitiveness is improved.

The utility model discloses a light-weight high-strength automobile hub which comprises a hub body, the hub body comprises a rim and a hub shaft, a supporting shaft is arranged on the hub shaft, a plurality of clamping grooves are formed in the supporting shaft, first spokes are arranged in the clamping grooves, the first spokes are hollow, second spokes and fixing rings are arranged on the first spokes, the second spokes are Y-shaped, and the fixing rings are arranged on the second spokes. The novel automobile hub has the advantages that the novel automobile hub is novel in structure and low in manufacturing cost, compared with a traditional automobile hub, the novel automobile hub is lower in weight, the weight of a whole automobile is reduced, the purpose of saving oil is achieved, light weight is achieved, the service life of the automobile hub is prolonged, and the service life of the automobile hub is prolonged. Meanwhile, by arranging the first spoke and the second spoke, the inner ring of the rim can be completely and powerfully supported, the second spoke is triangular, the stress of the rim can be dispersed, so that the stress is uniform, the strength of the whole hub is improved, and the strength and the toughness are ensured while the weight is reduced.

The present invention relates to a 460MPa grade low-temperature corrosion-resistant steel for frozen soil roads, which belongs to the technical field of corrosion-resistant steel and solves the problem that the corrosion-resistant steel in the prior art cannot meet the environmental requirements of highway construction in high-cold frozen soil areas. The corrosion-resistant steel comprises the following chemical components in weight percentage: C: 0.05-0.07%, Si: 0.3-0.5%, Mn: 1.5-1.8%, P: 0.015-0.02%, S: ≤0.005%, Cu: 0.02-0.03%, Ce: 0.02-0.03%, V: 0.08-0.12%, Ti: 0.015-0.02%, N: 0.02-0.03%, and the balance is Fe and inevitable inclusions; the hot-rolled structure of the 460MPa grade low-temperature corrosion-resistant steel for frozen soil roads is a mixed structure of acicular ferrite and bainite, wherein the content of bainite is ≤3%. The corrosion-resistant steel has good low-temperature toughness, corrosion resistance and large deformation resistance.

The invention discloses an iron-based / alpha-Fe amorphous nanocrystalline soft magnetic alloy, which is based on an iron-based amorphous strip mainly comprising Fe element, and contains Co element with atomic fraction of 6%-8%, Cu element with atomic fraction of 0.7%-1%, and the balance of trace elements which are at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like. And carrying out stress relief annealing on the strip with the assistance of a magnetic field, and then carrying out crystallization treatment. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the alloy only induces precipitation of a very small number of nanocrystals, and high saturation flux density and low coercive force can be obtained while the toughness of the strip is ensured.

The invention relates to a common polystyrene transparent compatible toughening agent and a preparation method thereof, and the common polystyrene transparent compatible toughening agent comprises the following components by mass: 20-80 parts of common polystyrene; 10-50 parts of an acrylic elastomer; 1-5 parts of a functional group reactant; 0.01 to 1 part of a catalyst; 1-5 parts of a silane coupling agent; 0.5 to 5 parts of a lubricant; 1-30 parts of a plasticizer; and 0.1-1 part of an antioxidant. The modified polystyrene has the beneficial effects that after the modified polystyrene is directly added into common polystyrene (GPPS) for production and processing, the transparency and impact resistance of the common polystyrene (GPPS) can be considered, and the obtained modified polystyrene has certain guarantee on transparency and toughness.

The application discloses a kind of production and cultivation methods of crisp chicken, comprising the following steps: S1, cultivate crisp chicken species: with E'mei black chicken as basic population, hybridization breeding is obtained with sasso chicken, and hybridization is obtained with Rongde small black chicken, and the crisp chicken species with chicken skin thickness not less than 2.3mm is selected and bred;S2, nutrition regulation feeding is carried out: the nutrition regulation feeding of at least 50 days is carried out to the crisp chicken species in fattening period, and the feed with the crude protein content of 18%-22% is provided, and the feed includes soybean meal, vitamin C, fat, fat metabolism aid, fermented soybean meal and trace nutrients;S3, breeding environment management is carried out: in fattening period, control chicken house environment temperature is 18-25 DEG C, relative humidity is 50%-60%, and breeding density is controlled.The application is cultivated by three system matching breeding, accurate nutrition regulation and fine breeding management multi-link cooperation, and the chicken species that fits crisp core characteristic is cultivated.

The invention discloses a ceramic cast steel composite reamer tooth and relates to the technical field of alloy cast steel matrix and random ceramic compositing, the reamer tooth is manufactured through a ceramic particle shaping process and a molten metal pouring process, and the ceramic particle shaping process comprises the steps of metallization pretreatment of ceramic particles, mixing of the ceramic particles, a binder and metal powder and the like; the molten metal pouring process comprises the steps of molten metal gravity pouring, high-temperature quenching and tempering heat treatment and the like. Compared with the prior art, the composite reamer tooth is formed by staggering the alloy cast steel base body and the random ceramic composite body, under the same working condition, the abrasion resistance of the reamer tooth for the dredger can be improved, the service life of the reamer tooth is prolonged by more than two times, the operation cost is reduced, and the working efficiency is improved.

A CVT steel belt system belongs to the technical field of CVT transmissions and comprises a plurality of first chain pieces and a plurality of second chain pieces distributed among the first chain pieces at equal intervals, the two sides of the first chain pieces and the two sides of the second chain pieces are provided with highly-asymmetric saddles respectively, and the two sides of the first chain pieces and the two sides of the second chain pieces are connected in series through first steel ring modules and second steel ring modules respectively. Limiting structures used for restraining the first steel ring module or the second steel ring module are arranged on the two sides of the second chain piece, the first steel ring module and the second steel ring module are matched with the corresponding saddles and each comprise a plurality of steel rings which are stacked up and down, and the steel rings which are stacked up and down form a strength and toughness gradual change structure. Two pushing piece structures with asymmetric saddle heights are designed, lateral limiting of the steel ring module can be achieved, steel rings of different layers can be reasonably arranged, the design redundancy is reduced, meanwhile, the strength and toughness of the steel rings are reasonably optimized, and by means of the steel ring combination mode with the strength gradually changed from bottom to top, the stability of the steel ring module is improved. And the use performance of the steel belt system is improved.

The present invention discloses a control and regulation system for producing medical cotton swabs, comprising: a raw material supply control module, used for controlling the supply speed and supply amount of medical cotton and wooden stick raw materials, the module comprising a sensor component, used for real-time monitoring the remaining amount of cotton and wooden sticks in a raw material storage bin, when the remaining amount of cotton is lower than a set threshold, the sensor will send a signal to trigger a raw material replenishment mechanism, and automatically retrieve cotton from a raw material reserve for replenishment; for wooden sticks, when the remaining amount of wooden sticks is lower than a set threshold, a replenishment operation will be triggered; the supply speed control formula is: for cotton, supply speed, wherein is the demand rate of cotton for current cotton swab production equipment, unit: g / min, is the cotton supply regulation coefficient; the present invention uses the raw material supply control module to accurately monitor the remaining amount of cotton and wooden sticks in real time, replenishes in time when the inventory is lower than the set threshold, and avoids the accumulation or shortage of raw materials at the same time, which is beneficial to cost control and production efficiency improvement.

The invention discloses a method for producing a high-chromium grinding ball by using an oil-like quenching liquid, which comprises the following steps: austenitizing a high-chromium grinding ball blank, quenching by using the oil-like quenching liquid, and tempering to obtain the high-chromium grinding ball, wherein the oil-like quenching liquid is prepared from the following raw materials in parts by weight: 13 to 15 parts of polyvinylpyrrolidone, 4 to 6 parts of sodium carboxymethyl cellulose, 1 to 2 parts of phytic acid and 77 to 82 parts of water. According to the invention, nano VC, Mo, Ni and oil-like quenching liquid in proper proportion are selected, and a proper heat treatment process is combined, so that the hardness of the grinding ball can be improved, and good toughness can be maintained.

The invention belongs to the field of electromagnetic materials, and particularly relates to a flexible magnetic shielding fiber which comprises a core material and a metal wire spirally wound on the outer circumferential surface of the core material. The core material is a polymer fiber material; the metal wires are formed by chemically plating coatings on the surfaces of permalloy fibers; a plating solution for surface chemical plating comprises the following components: an iron-containing compound, a nickel-containing compound, a reducing agent, a complexing agent and a pH value regulator. The fabric prepared from the magnetic field shielding fiber has the advantage of flexibility and also has good low-frequency and magnetic field shielding performance. The invention also provides a preparation method of the flexible magnetic shielding fiber.

The present invention provides a polyurethane rigid foam material and a preparation method thereof, belonging to the technical field of polyurethane rigid foam. The preparation method comprises: dehydrating a polyether substance; preparing a combined polyether mixture; preparing a polymerized MDI mixture; and mixing the combined polyether mixture with the polymerized MDI mixture to obtain the polyurethane rigid foam material. The present invention dehydrates the polyether substance to eliminate the influence of heat and carbon dioxide generated by the addition of water, and adds a combination of multiple low-boiling point foaming agents, thereby maintaining the toughness of the foam and greatly reducing the thermal conductivity of the material.

The utility model relates to the technical field of bridge guardrails, and discloses a bridge guardrail bridgehead transition structure which comprises a transition plate, one end of the transition plate is connected with a roadbed section wave-shaped guardrail plate, and the other end of the transition plate is connected with a metal beam column type bridge guardrail lower cross beam. The buffer connecting assembly is arranged on the rear side of the transition plate, one end of the buffer connecting assembly is connected with the bridge guardrail lower cross beam, and the other end of the buffer connecting assembly is connected with the roadbed section wave-shaped guardrail plate; through the arrangement of the transition plate and the buffer connecting assembly, the wave-shaped guardrail plate, the transition plate, the buffer connecting assembly and the cross beam can be connected to form a transition structure with buffer and protection effects; the anti-deformation effect of the transition plate and the buffer connecting assembly is used for carrying out buffer protection on the connecting position of the roadbed section wave-shaped guardrail plate and the bridge guardrail; the connecting structure has the advantages of simple structure, convenience in mounting, good buffering and energy absorbing effects and the like, and solves the problems of poor toughness and difficulty in later maintenance and replacement of the connecting structure in the prior art.

The invention provides a composite forming auxiliary reagent for assisting living tissue shaping and a living tissue explant slice preparation method. The preparation method comprises the following steps: dissolving 4-15 parts by mass of methacrylated polyether F127 diacrylate F127DA, 2.5-5 parts by mass of a GelMA gelatin aqueous solution, 4-6 parts by mass of gelatin, 2.5-5 parts by mass of AlgMA sodium alginate hydrogel and 0.20-0.30 part by mass of an LAP photoinitiator in 100 parts by volume of a PBS buffer solution, and then completely immersing a tissue block into a composite forming auxiliary reagent, irradiating by using a UV light source to obtain a tissue hydrogel block, and slicing to obtain a living tissue explant slice; according to the composite forming auxiliary reagent, a tissue hydrogel block formed by wrapping a tissue block has proper strength and toughness, so that the whole structure can be ensured to have certain hardness and toughness, the tissue block is not easy to deform during cutting, and extra damage and even death of cells in the tissue caused by excessive strength under extrusion are also avoided; and gel fragmentation caused by cutting can be avoided, so that living tissue explant slices with uniform thickness are obtained.

The utility model relates to the technical field of composite stainless steel pipes, and discloses a composite stainless steel pipe which comprises a steel pipe body, the steel pipe body is composed of a stainless steel outer pipe and a carbon structural steel inner pipe, a buffering mechanism is arranged between the stainless steel outer pipe and the carbon structural steel inner pipe, and a high-temperature-resistant mechanism is arranged on the surface of the stainless steel outer pipe. A heat preservation mechanism is arranged in the buffering mechanism. External impact and vibration are absorbed and dispersed through the buffering mechanism, the carbon structural steel inner pipe is protected against direct impact and damage, under the action of the high-temperature-resistant mechanism, the strength and toughness of the stainless steel composite pipe are guaranteed, the problems of breakage, deformation and the like are prevented, the service life of the stainless steel composite pipe is prolonged, safety of the stainless steel composite pipe is improved, and the service life of the stainless steel composite pipe is prolonged. The heat preservation mechanism can prevent liquid in the stainless steel composite pipe from being frozen.

The utility model provides a connecting hose applied to vibration equipment, and relates to the technical field of pipelines. The connecting hose applied to the vibration equipment comprises a hose body, the hose body comprises an inner layer and an outer layer, the inner layer is a silica gel layer, the outer layer is a PVC layer, the hose body is provided with a limiting assembly, the limiting assembly is sleeved with a clamping assembly, one end of the clamping assembly is provided with a connector, and the other end of the clamping assembly is provided with a connecting rod. A fixing assembly is arranged at the other end of the clamping assembly, a buffering piece is arranged between the clamping assembly and the fixing assembly, and a damping piece is arranged on the clamping assembly. The hose damage frequency can be reduced, and the hose service life is prolonged.

The invention provides a glass fiber reinforced plastic oil pipe connecting structure and a preparation method thereof.The method comprises the steps that 40-60 parts by mass of bisphenol A epoxy resin, 3-8 parts by mass of polyfunctionality epoxy, 2-5 parts by mass of epoxy diluent, 0.1-0.5 part by mass of coupling agent, 20-40 parts by mass of curing agent and 0.1-0.5 part by mass of accelerant are mixed, stirred and left to stand, and thermosetting resin mixed liquid is obtained; the fiber soaked with the thermosetting resin mixed liquid glue solution is wound on a core mold to be cured and formed to obtain the glass fiber reinforced plastic oil pipe connecting structure, the fiber is carbon fiber or aramid fiber with the modulus higher than that of glass fiber, and the core mold is set according to the size of the glass fiber reinforced plastic oil pipe connecting structure. The connecting structure is matched with the application of high well depth, high-temperature-resistant epoxy resin is used in a composite material, two resins with different epoxy equivalents ensure the toughness of the epoxy resin (the toughness is increased by high epoxy equivalents), the viscosity of the resin is reduced by the diluent, but no solvent exists. The final resin formula has good processability and good toughness, can be cured at medium and high temperatures, and has a long-term use temperature of 120 DEG C or above.